EBCDIC为Hex

Question

我有一个GUI，我尝试将EBCDIC字符串转换为十六进制，但我得到了NumberforamtException。

ebcdichex.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            ausgabe6.setText("");
            String hexadecimal3 = eingabe4.getText().replace("\n", "");
            byte[] chars2;

            try {
                chars2 = hexadecimal3.getBytes("IBM-273");
                StringBuilder hexa2 = new StringBuilder();
                for(int i = 0;i<chars2.length;i++){
                    byte[] b = {(byte) Integer.parseInt(""+chars2.toString(),16)};      
                    hexa2.append(b);
                }
                ausgabe6.append(hexa2.toString());
            }
         catch (UnsupportedEncodingException e1) {

            e1.printStackTrace();
        }
        }
    });

例外：

Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For 
input string: "[B@1d05c81"

有谁知道我的错在哪里？